Ramps from Interstate 787 to eastbound Interstate 90 over the Hudson River on the Patroon Island Bridge will be closed in both directions between Albany and Rensselaer on Saturday.

One eastbound right lane will also be closed for the length of the Patroon Island Bridge as work is done on the bridge and ramps.

Closures start at 5 a.m. and are expected to last to 2 p.m.

A detour will direct drivers to head west on I-90 to Exit 6, then north on Route 9. Motorists then make a left onto Northern Boulevard over the bridge near Memorial Hospital, then left to the ramp onto eastbound I-90.

In another project, the right lane of the westbound ramp onto the Dunn Memorial Bridge will close from 10 a.m. to 3 p.m. Mondays to Saturdays.

The right eastbound lane of the bridge and the right lane of the ramp from I-787 southbound onto the bridge will also close. Closures are 7 a.m. to 3 p.m. Mondays to Saturdays.

The closings are part of a project to repair the bridge over the Hudson River linking downtown Albany to Rensselaer.